Bascule-bridge.



A. H. SGHERZER.

BASGULE BRIDGE.

APPLIOATION FILED MAR. a, 191s.

1,1 14,535. Patented ont. 2o,- 1914.

A. H. SGHERZER.

BAscULB BRIDGE.

APPLICTION FILED MAB.. 3, *913. 1,1 14,535, Patented Oct. 20, 1914.

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(JJ/)Ali O m E L u www? m m@ O Thumb f i H o m HMHL j m m@ /l (UNL. o o w ma@ M m /me, 5 m W. \dmv Y ALBERT E. SCHERZERF'GHICAGO, ILLINOIS.

BAscUIQnABmDeE.

Specification ofltters Patent.

Patented Oct. 20,1914.

App1ication led March 3, 1913. Serial No. 751,733.

To all 'whom 'it may concer/n :V

Be it known that I, ALBERT H. Scnnnznn, acitizen of the UnitedV States.,l anda resident of Chicago, in the county of Cook. and 5 State oflljnois, have invented certain new and useful Improvements in Bascule- Bridges; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the `characters of reference marked thereon, whichform a part of thisspecification. f

This invention relates to improvements in bascule bridges of the rolling lift type, and

the-tread portions of the curved segments or bearers upon which the bridge leaf rests and' rolls and to the tracks by which said bridge is supported. Among the objects of my invention is to provide. an improved tread for the segments or bearers of suchv bridges, with a view to strengthening the treadfsections thereof, and to provide meanswhereby sectional tread and trackl portionsmay be applied to the segments and track girders, respectively, in such a way as to be separately removable, and to thereby e able defective or injured treadL or track tions to be removed and replaced by perfect ones.v Y

.The invention consists in the combination and arrangement of the parts hereinafter described and more specifically pointed out inthe appended claims.

In the drawingst-Figure 1 is a partial side elevation of a rolling lift bridge leaf and one of its supporting `trackvgirdersl l equipped with my invention, with some of the details omitted. Fig. `2 is an enlarged artial lsection and partial elevation ofthe ridge segment and track. Fig. 3 is a longitudinal-section of two adjacentptread sections takenin a curved plane'jparallel to the bearing .faces of said sections, .4 -isa top plan view of a-Bpluralityhof ad] acent Y .sectionsof the track. ig. 5 isa,` side elevation'of the latter, partially broken away. Figs.` 6 and 7 are sections'taken through the tread andtrack sectionsfat two different vertical planes:

. As shownfin the shore end of a rolling lift bridge leaf,

11 one o f the segments or bearers on which the leaf rests andA rolls, 12 the counterwei ht for-the leaf, and 13 one of the' track gir refers more specifically -to improvements in' brid the drawings, 1o designates:

which supports the leaf. These'parts, in

themselves, may be made of any usual or preferred construction and ,need not be furmitted from the segments. orJ bearers to the V tracks'is a concentrated load on parts of the tread and track sections which may be built suiliciently massive to support the load brought upon the same. Said bearing faces are thus also arranged in proper relation to the structure of the segments and girders to'which they are applied. The said track sections 18 are herein shownV as also made up of a plurality of the relatively short sections or members which are attached to the Webs 20, 20 of the track gir-ders.

vAs herein shown the tread sections 15 of the bridge leaf segments are ofl hollow construction and'comprise central or intermediate bearing portionsZO, on the lower faces ofwhich are ,formed the bearing faces 16, and parallel lWalls 21, 21 which .extend upf wardly or outwardly therefrom and are provided at their u per margins With lateral flanges 22, 22. en `the tread sections are applied t0 a twoweb segment, the Webs 24, 2,4 thereof are arranged in the planes of the anged walls 21,121 of the tread sections, and` said tread sections are removably attached to the webs through the medium of angle bars 25, the webs of which overlap and are riveted or boltedto .the .webs of the segments, and the flanges of which over ap and are attached ,to the llateral "flales 22 ofthe track sections, as by means of e bolts 26. The marginal portions of the webs 24` may be. further reinforced, as by the .plates 24 applied to the inner vface of the web 24 and rivetedx or bolted-thereto, to provide the proper strength-at this point, as shown in Flgs. Gland `7. rlhe said tread sections are provided at their ends with 1lateral anges 28, which, in the assembled positions of the sections on the tread, abut against cach other, and said flanges are apertured ltogreceive bolts 30 by which the tread sections are attached together end to end. This construction provides means for connecting the separately applied tread sections to the segment in such manner as to c'onstitute a practically continuous or onepiece tread, when the parts are assembled and fastened together, while permitting said tread sections to be separately removed and replaced when required.

The track sections 18 may be constructed and applied to the track girder 13 in a generally similar manner as are the tread sections above-described, and as more clearly shown in Figs. 2, 6 and 7 Said track sections also t together at their ends and are fastened together by means of the bolts 32 which extend through lateral flanges 33 of the adjoining ends of the track sections. They comprise the central or bearing portion 34 on which are formed the bearing faces 17 and the side walls 34 which are flanged at their lower margins and are attached to the webs 20 by angle bars 342.

From an inspection of Fig. 6, it will be noted that the bearing or engaging faces of the tread. and track sections are relatively narrow and principally within the width of the flanges or walls 21, 34 of said tread and tracksections;` respectively, so that thereby the load is concentrated on relativly narrow portions of the tread and track sections, which are built suiiiciently massive to support the load. The anges 28 and 33, of the tread and track sections, respectively, terminate short of the bearing faces of said sections, as most clearly shown in Fig. 6, and thebearing faces terminate at their margins slightly short of the planes of the walls 21 and 34', so that saidlatter flanges and the extreme side marginal portions of the bodies of the sections do not bear upon each other. This is an advantage, inasmuch as if a substantial load be transmitted through a relatively thin or weak unreinforced portion of the track and tread sections by reason of lateral pressure due to uneven lc-adin or tendency to twisting of the bridge lea on the tracks, there would be a tendency to break .such lateraliunreinforced portions.

In'Figs. 3, 4- `and 6, I have shown the tread and track sections as provided with transverse end walls that are formed to provide tongues 35, 36 resv ectively, which 'enter corresponding notc es 37, 38 of the-tread and track sections, respectively. Th1s constructionprovides continuous bear-v ing surfaces between adjacent sections, and also aids to hold the interlocked sections laterally in linev and prevent a tendency to displacement thereof under unequal lateral loading stresses. The said tread and track sectionsv are lprovided laterally outside of the bearing faces thereof with interlocking teeth or racks which prevent displacement of the tread relatively to the tracks in a line parallel to the tracks. As herein shown, the track sections are provided at their lateral margins and outside of their bearing faces with upstanding teeth 40, and the tread sections are provided in line therewith with separated lugs 41 between which are formed notches 42 into which the teeth 40 engage. These teeth and notches are reinforced or strengthened by fillets 43, 44 as best shown in Fig. 7 The arrangement shown consti# tutes an exceedingly simple and effective means of providing an interlocking connection between the tread and track sections, without limiting in any way the capacity of the load transmitting bearings between said parts, or interfering with the bearing faces of the tread and track sections.

The structural details are capable of some Variation within the spirit and scope of the invention, and the invention is not limited to the precise details shown except as vhereinafter made the subject of specific claims and as imposed by the prior art.

I claim as my invention :-z

' 1. A rolling 'lift bridge comprising a leaf adapted to rest and roll on a support, and a tread comprising tread sections attached to the leaf and having laterally fixed interlocking engagement with each other.

2. A rolling lift bridge comprising a leaf adapted to rest and roll on a support, and a tread comprising tread sections removably attached to the leaf and overlapping means connecting the adjoining ends of said tread sections and extending longitudinally thereof to constitute a continuous tread and laterally interlocked to hold the tread sections laterally fixed with respect to each other.

3. A rolling lift bridge comprising a leaf adapted to rest and roll on a support, and a tread therefor comprising a plurality of removably applied tread sections provided at their ends with tongue and notch connections, for the purpose set forth.

4. A rolling lift bridge comprising a leaf adapted to rest and roll on a support and a tread comprising tread sections having means to removably attach them to said leaf, said means to attach said sections to said leaf comprising laterally extending anges 0n said tread sections, like fianges on the leaf and means extending through said {ialges to fasten said tread sections to said 5. A rolling lift bridge comprising,

' side walls in line with the webs of said segment and having means toremovably attach thesame to said segment.

6. A rolling lift bridge comprising, in combination with a leaf and a two web segment through the 'medium ,of which the leaf is supported, of tread sections having bearing faces for contact with a support, lsaid tread sections having radial flanges in line with the webs of said segment, said radial flanges and the webs having lateral fianges which engage each other, and fastening means extending through said latter flanges.

7. A rolling lift bridge comprising, in combination with a leaf and a two web segment -through the medium of which the leaf is supported, of tread sections having bearing faces for contact with a support and side walls' in linev with the webs of said segment and having means to removably attach same to said segment, said bearing faces being solid orl unbroken and fixed locking projections on said tread sections laterally exterior to said bearing faces.

8. A rolling lift bridge comprising a leaf provided with supporting segments, and tread sections therefor comprising curved bearing faces and walls having mea-ns to attach them to said segments, and an'ges on said tread sections laterally exterior to said bearing faces having fastening means extending therethrough, said lateral flanges terminating short ofthe bearing faces of said tread sections.

9. A rolling lift bridge comprising a leaf provided with supporting segments, and tread sections therefor comprising curved bearing faces and walls having means to attach them to said segments and-flanges on said tread sections laterally exterior to said bearing faces havin fastening means extending therethroug said lateral flanges terminating short of the bearing faces of said tread sections, and the ends of said lateral flanges, latera tread sections having laterally interlocking tongue and groove connection.-

10. A rolling lift bridge comprising a leaf adapted to rest and roll on a support, and a tread comprising tread sections attached to the leaf and having longitudinally overlapping laterally fixed interlocking engagement with'each other at their ends, combined with a supporting girder provided with removably attached tread sections hav- 'ing like overlapping engagement with eac-h other.

l1. Ina rollinglift bridge, a supporting two-web girder for the bridge and a removable sectional track thereon provided with anupwardly facing bearing face and with walls in line with the webs of the girder, and at the lower sides of the walls with lateral flanges, lateral flanges on the girder webs, and bolts extending through said flanges. y

12. In a rolling lift bridge, a supporting two-web girder for the bridge and a removable sectional track thereon provided with an upwardly facing bearing face and with walls in line with the webs 0f the girder, andat the lower edges of the `wallswith flanges on the girder webs, fastening bolts extending through said flanges and locking teeth or projections on said sections arranged laterally outside of said bearing faces.

In testimony, that I claim the foregoing' as my i vention I aix my signature in the resence of.two witnesses, this 1st day of arch, A. D. 1913.

ALBERT H. SCHERZER.

Witnesses:

G. E. Downs, F. ROMAN Asz'MAN. 

